This solution worked out for me on my Hi10 Plus. THANK YOU EMILY! I was so depressed over the past few weeks over this 'coz I thought that when I did a full Windows 10 reset (while I removed the SD card) without keeping any files that the SwitchNow functionality was also wiped in the process and that I had to reflash Windows 10 again to regain it. I see now that this is not the case. I am so happy to have the SwitchNow function again in Windows!